Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h

Index: third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
diff --git a/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h b/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
index 0407b10d9d7967c508778ede0db63fb4f75d112d..d5fa6b17751d5a3e692c4832135e30fc2cb0b359 100644
--- a/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
+++ b/third_party/WebKit/Source/core/css/parser/SizesAttributeParser.h
@@ -26,10 +26,10 @@ class CORE_EXPORT SizesAttributeParser {
   bool Parse(CSSParserTokenRange);
   float EffectiveSize();
   bool CalculateLengthInPixels(CSSParserTokenRange, float& result);
-  bool MediaConditionMatches(MediaQuerySet* media_condition);
+  bool MediaConditionMatches(const MediaQuerySet& media_condition);
   float EffectiveSizeDefaultValue();
 
-  Member<MediaQuerySet> media_condition_;
+  RefPtr<MediaQuerySet> media_condition_;
   Member<MediaValues> media_values_;
   float length_;
   bool length_was_set_;